N-dimensional time

[goldeng8]

The idea of 3,4,....11 dimensional spacetime has been around for a while.

This always means (N-1)-dimensional space, with the usual addition of time as one dimensional.

Are there any serious thoughts on the possibility of M-dimensional time, and what this would mean in the physical world?

(Maybe this is somewhat of a parallel discussion to the earlier post of 'imaginary time' here, but I decided to start a new thread anyway)

[MathematicalPhysicist]

there's a theory that adds another time dimension and it's called f theory.
the developer of theory is cumrun vafa.

[quartodeciman]

Here is something to contemplate.

The four dimensions of basic relativity are ct, x, y, z. Though often called one time dimension and three space dimensions, in fact, 'ct' is a space dimension (speed times time). A famous relativity space invariant equation is

s2 = - (ct)2 + x2 + y2 + z2

Now represent this by substituting uniform variable names from

x0 <== ct
x1 <== x
x2 <== y
x3 <== z

Here is the result.

s2 = - x02 + x12 + x22 + x32

Every term is a space term.

But it can all be rewritten in time dimensions.

&TAU <== is/c
t0 <== t
t1 <== x/c
t2 <== y/c
t3 <== z/c

The result.

&TAU2 = + t02 - t12 - t22 - t32

This is a relativity time invariant equation using four time dimensions.

[Doctor Luz]

This has few to be with the subject however, when I was 'studiying' Quantum Mechanics, one day my teacher told (looking at me when I was about to fall asleep) that the time was not a dimension, it was a parameter. I never understood what he was talking about that day.

[Tyger]

Originally posted by Doctor Luz
This has few to be with the subject however, when I was 'studiying' Quantum Mechanics, one day my teacher told (looking at me when I was about to fall asleep) that the time was not a dimension, it was a parameter. I never understood what he was talking about that day.

Your teacher was right. Space has three degrees of freedom, that is what a dimension is, a degree of freedom. But you can't move around in time the same way, if you move around in space a lot you change your movement in time some, but bsically you move through time at the same rate, whether you want to or not.